<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>

  <div id="app">
    <qf-button></qf-button>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>

  <script type='text/x-template' id='button'>
    <div>
      <button>异步的组件</button>
    </div>
  </script>

  <script>
    // 定义一个异步组件
    Vue.component('qf-button', function(resolve, reject){
      setTimeout(()=>{
        resolve({
          template: '#button'
        })
      }, 5000)
    })

    var app = new Vue({
      el: '#app'
    })
  </script>

</body>
</html>
